Vitamin C is arguably the best known vitamin but many people misunderstood its value and the daily amount. Vitamin C is an essential nutrient that should be included as part of your daily diet. And luckily, as a water-soluble vitamin, too much won't hurt you. Vitamin C helps modify precursor proteins in order for collagen production. Collagen is the most abundant protein in the body. It is used to make and strengthen skin cartilage, tendons, ligaments, bones and teeth. Vitamin C also acts as one of the main antioxidants in the body. It protects cells from potentially damaging by-products.